- 问题详情:Afteracouplehashadtheirfirstchild,totheirdisappointmenttheybecomeinfertile(不生育的)andcannothavemorechildren.Manycoupleshavedifficultieshavingchildren,andsometimesitisimpossibleforcouplestohavechildrenbecausetheyareinfertile.Fortunately,clon...
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